WO1998031535A1 - Procede et dispositif pour traiter des torons avec un materiau pulverulent - Google Patents

Procede et dispositif pour traiter des torons avec un materiau pulverulent Download PDF

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Publication number
WO1998031535A1
WO1998031535A1 PCT/NL1997/000691 NL9700691W WO9831535A1 WO 1998031535 A1 WO1998031535 A1 WO 1998031535A1 NL 9700691 W NL9700691 W NL 9700691W WO 9831535 A1 WO9831535 A1 WO 9831535A1
Authority
WO
WIPO (PCT)
Prior art keywords
strands
spread
chamber
processing
pulverulent
Prior art date
Application number
PCT/NL1997/000691
Other languages
English (en)
Dutch (nl)
Inventor
Johannes Albertus Petrus Merkelbach
Original Assignee
Beleggingsmaatschappij 'ab-Ovo' B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beleggingsmaatschappij 'ab-Ovo' B.V. filed Critical Beleggingsmaatschappij 'ab-Ovo' B.V.
Priority to AU53470/98A priority Critical patent/AU5347098A/en
Publication of WO1998031535A1 publication Critical patent/WO1998031535A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length

Definitions

  • the invention relates to a method and an apparatus for treating strands, which are composed of filaments, with a pulverulent material.
  • a method and apparatus are disclosed by WO-87/OO563-A.
  • strands composed of filaments are treated with a pulverulent medium, a separation between the filaments, or spreading of the strands, being effected and the processing medium being suspended in a liquid or in a gas, whereupon the suspension thus obtained is directed, under controllable pressure, against the material to be treated.
  • US-5.057,338 discloses a method for impregnating strands consisting of filaments, wherein the strands are first spread before being impregnated with a powdered plastic.
  • the impregnation step comprises the use of a fluidized bed through which the spread strands are passed.
  • the plastic particles are blown from the top of the impregnating chamber onto the spread fibre bundles moving in the longitudinal direction. Underneath the fibre bundle, the powder which has not impregnated is then collected by suction and, via a tube, carried back to the top of the impregnating chamber.
  • the plastic particles are kept in suspension within the fluidized bed by means of the wall of the impregnating chamber being caused to vibrate continuously.
  • US-A-5,102,690 discloses a similar method for impregnating fibres with powdered plastic. Again, use is made in the impregnating step of a fluidized bed. In this case, however, the powder particles are kept in motion by vibration means which are fixed to the wall of the impregnating chamber and which are activated by a frequency chosen from audible and ultrasonic frequencies.
  • the invention therefore relates to a method far treating strands comprising filaments with 'a pulverulent processing medium, wherein the strands are spread and the spread H rends thus obtained are then passed into a processing chamber, wherein the pulverulent processing medium, as a powder/fluid mixture, at the start of the processing chamber, is passed over the entire width of the spread strands, at a velocity which is at least as high as the velocity of the spread strands, in a direction h ch runs parallel to the direction of movement of the spread strands or at an angle of at most 60" with that parallel direction towards the spread strands.
  • the fluid can be a gas, preference being given to air, because of the price.
  • an inert gas should preferably be used.
  • the processing medium it is preferable for the processing medium to be introduced into a liquid, this can be a solvent or a su ⁇ pension medium.
  • the method according to the invention allows composites to be produced which can serve as semifinished products which cah undergo further processing. If the processing medium used is.
  • thermoplastic or thermoBetting powdered plastic composites are obtained which are made of the plastic employed and in which the filaments of the strands act as reinforcing material .
  • the compositeB themselves can al ⁇ o very suitably be employed as reinforcing material, for example wound around steel or plastic pipelines or (high) pressure vessels,
  • the composites themselves can also be used for the fabrication of pipelines. Equally, they can very ⁇ uitably b ⁇ processed into other products or to make other products, a high mechanical strength and/or stiffness in conjunction with low dead weight being of great importance irt this context. Examples of possible applications include car bodies or sailcloth.
  • the strands or filament bundles which are treated by means of the method according to the invention will, as a rule, come from a plurality o bobbins and are combined into a row or band of strands situated next to one another, which are preferably all kept at roughly the same tension, before they are subjected to the method according to the invention.
  • the strands can, if appropriate, be preheated before being subjected to the method according to the invention. All this is known, however, and a manner in which this can be implemented is described, for example, in the abovementioned international patent Spreading of the strands, or separation of the filaments of which the ⁇ trands consist, can be effected in ways known per ⁇ e.
  • spreading of the strands is achieved by means of an r stream, i.e. an air stream separates the filaments in the individual reinforcing fibres from one another, so that a homogeneous web of more or less parallel filaments with fairly regular spacings is produced.
  • This web is then treated with a processing medium.
  • a so-called air knife is used which is positioned above the strands and perpendicular to their direction of movement.
  • the pulverulent processing medium in the form of a suspension in a gas, is brought into contact with the spread strands in a specific manner.
  • this is done in chamber which is open both at the side where the spread strands are fed in and at the side where the treated strands are withdrawn.
  • the powder/ as mixture, or the powder suspended in gas is injected, over the entire width of the spread strands, into the chamber in a direction which is roughly parallel to the direction of movement of the spread Strands or in a direction which differs by at most 60°, preferably at most 4 ". towards the 'Spread strands, from that parallel direction. Excellent results are achieved if this latter angle is at most 30 * ,
  • the injection direction of the powder/gas mixture is then adjusted via t he angle at which the nozzles are positioned. This angle is primarily determined by weight and size of the powder particles.
  • An important point in this context is that a cloud of particles must be created in the processing chamber, so that optimum uptake of the powder particles by the spread strands can take place, in particular owing to settling.
  • Powders consisting of relatively small powder particles and/or particles having a relatively low weight are therefore preferably injected into the processing chamber at a direction approximately parallel to the direction of movement of the spread strantjs.
  • the slightly larger particles and/or the particles having a relatively high weight can be blown into the processing chamber at an angle.
  • the particles which then pass through the spread strands bounce against the bottom of the processing chamber and thus re-enter t a processing chamber.
  • a powder cloud is formed whpge turbulence and residence time in the processing chamber is such that the spread strands are optimally penetrated by the powder particles, resulting in a product having excellent properties.
  • the velocity at which the powder particles are blown into the processing chamber is chosen so as to allow optimum utilization of the internal volume of the processing chamber in allowing the powder particles to settle on the spread strands while the latter move through the chamber.
  • the powder particles are blown into the chamber at a velocity which is higher than the velocity at which the spread Strands move through the chamber.
  • a velocity which is from 2 to 20 times the velocity of the spread strands is very suitable, a velocity of from 5 to 1 times greater being preferable. However, this velocity again depends on the size and weight of the powder particles.
  • the velocity is preferably chosen so as to ensure that at the end of the processing chamber, where the treated spread strands leave the chamber, the velocity of the powder particles has been reduced to virtually zero.
  • the velocity at which the spread strands move is generally between 10 and 100 metres per minute, preferably between 30 and 80 metres per minute. Homogeneous impregnation is thus obtained, a high proportion of ppwder being taken up.
  • the gas used for the powder/gaB mixture ig preferably air, but other gases in which the processing medium ' is stable can also be used.
  • the processing chamber is also open at the side where the treated strands leave the chamber, there is a pressure differential between the point where the powder/gas mixture enters the chamber and where the treated strands leave the chamber.
  • the powder/gas mixture moves cocurrently in the direction of movement of the spread strands, whereas the powder particles from that powder/gas mixture settle onto the spread strands and come to rest between the filaments.
  • Excess powder and powder which has not been taken up properly can be collected by suction when the treated strands emerge from the processing chamber, or can be removed in some other way.
  • the strands which can be treated by the method according to the invention comprise, in particular fibres which are known for their high mechanical strength and/or stiffness.
  • Suitable strands are, in particular, those strands which comprise aramid fibres, carbon fibres, glass fibres, ceramic fibres, polyethylene fibres, polypropylene fibres, and strands comprising mixtures of two or more of these materials.
  • Strands comprising aramid fibres, carbon fibres or glass fibres are to be pre erre . however .
  • Processing or impregnating media suitable in particular comprise one or more of the following plastics: rubber, polyamide- 2, polyamide-6, polybutylene terephthalate , polyetherester, polyetheretherketone, polyethersulphone , polyetherimide , polypropylene, polyphenylene sulphide, polyurethane and poly (vinylidene fluoride) .
  • plastics rubber, polyamide- 2, polyamide-6, polybutylene terephthalate , polyetherester, polyetheretherketone, polyethersulphone , polyetherimide , polypropylene, polyphenylene sulphide, polyurethane and poly (vinylidene fluoride) .
  • the particle Size of the pulverulent processing medium to be used there are no strict rules. Powders of various particle size distributions can be used in the method according to the invention. Obviously, at least a fraction of the powder particles should be sufficiently small to be able to be accommodated between the filaments of the spread strands.
  • the particle size distribution of the pulverulent processing ' medium is such that at least 90 v %_ of the particles have a diameter in the range of from 20 to 250 ⁇ m. preferably from 25 to 200 urn.
  • the treated ⁇ trands are combined into a single strand having a preset width and thickness and are subjected to a series of further steps so as to obtain the ultimate composite.
  • These further steps, their sequence end the way in which they can be carried ou t are known per se. for example from WO-87/OO563-A, US-A-5,102,690 and US-A-5,057,338. and successively comprise heating, cooling and winding. Heating in an oven is necessary t ⁇ fix the powder particles between the filaments of the strands. Heating by exposure to infrared radiation s a very suitable method, but other methods such as exposure to hot air can also be used.
  • Heating generally takes place to temperatures above the melting temperature of the impregnated plastic, but below the degradation temperature of this plastic. Cooling is preferably effected by means of air cooling, but water cooling is also a very suitable option. After winding onto a bobbin, the composite is ready for further use.
  • the invention further relates to an apparatus for implementing the above- escribed method, said apparatus comprising one or more members for spreading the strands and a chamber in hich the treatment takes place, wherein said chamber; (i) is open at the side where the spread strands are fed in and at the Side where the treated strands are withdrawn, and (ii) at the side where the spread strands are fed in is provided, over its entire width, with one or more conduits for supplying the gas stream containing, suspended therein, the pulverulent processing medium, (iii) at the aide where the treated strands are withdrawn from the chamber is provided, below the level of the emerging strands, with means for collecting and removing any excess processing material .
  • the members used for spreading the strands can be members ⁇ already known.
  • the chamber in which the treatment takes place is preferably rectangular in shape and has a width which is slightly larger than the width of the spread strands. The difference is preferably no more than 1 cm.
  • the height of the processing chamber i ⁇ small and iB preferably no more than 10 cm. whereas a height of at most 5 cm is most preferable.
  • the bottom of the chamber nay be provided with vibration means. BO that it can be set to vibrate continuously or periodically to remove excess powder which has remained behind. This can be done fairly simply, since the chamber is open at both ends.
  • the bottom may also be provided with a moving belt to remove residual powder, either continuously or periodically.
  • the conduits for supplying the powder are disposed at the infeed side of the processing chamber over the entire width of the chamber.
  • the conduits can be connected to a manifold which is connected to a proportioning unit for either gravimetric D ⁇ volumetric proportioning of the powder. Gravimetric proportioning is preferable, because of the greater accuracy. Powder proportioning units are known and commercially available.
  • Such means Disposed at the discharge side of the processing chamber and below the level of the emerging strand ⁇ are means for collecting and removing any excess powder.
  • Such means may comprise a discharge reservoir provided with suction-removal means such as a suction orifice. The powder removed by suction can be recycled to the proportioning unit for reuse,
  • Figure 1 is a side view of an apparatus according to the invention.
  • Figure 2 is a plan view frot ⁇ above of an apparatus according to the invention.
  • Figure 3 is a side view of an installation with the aid of which the method according to the invention can be implemented.
  • the treated spread ⁇ trands leave the impregnation box (7), and the powder not taken up within the strands is collected an ' weighed by means of collection and discharge reservoir (8) and conduit . (9).
  • the treated strands are then, via roller (10), brought together again by being guided between guide elements (11). whereupon the combined, treated strands (12) are guided away via roller (13) for further treatment.
  • the strandB to be treated are unreeled from reeling unit (14), and the strands running parallel are then kept at roughly the same tension by tension control unit (15).
  • the strands kept at approximately identical tension are then preheated in hot-air heaters (16). This preheating step can also be dispensed with if desired.
  • spreading of the strands takes place via air knife (2) , and the spread strands are then, via roller (4). passed into the processing chamber (7).
  • the processing medium is passed to the processing chamber from proportioning unit (26) by means of conduits (6). After treatment, any excess powder and/or powder which has not been taken up can be weighed via collection and discharge reservoir (8).
  • the treated, spread strands are combined via roller (10) and guide elements (11).
  • the treated, combined strands i.e. the "precursor composite" (12) are then guided towards the oven section. Passing the precursor composite (12) through a number of ovens (17), for example infrared ovens, ensures that the powder particles taken up will melt, as a result of which a single entity is formed comprising a plastic matrix with reinforcing strands.
  • the hot precursor composite is then given the correct shape by means of calender rolls (20) and ovens (19) ⁇ and the composite thus obtained is then cooled in cooling unit (21).
  • the rolls (22) are driven rolls which draw the Strands through the entire processing apparatus.
  • the composite thu ⁇ obtained can either be granulated, giving composite granules, by means of cutting unit (24) or be wound onto one of the bobbins (25)- Both options are schematically indicated in Figure _ .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

L'invention concerne un procédé permettant de traiter des torons constitués de filaments avec un milieu de traitement pulvérulent. Selon le procédé, on étale les torons et on fait passer les torons étalés ainsi obtenus dans une chambre de traitement; on applique le milieu de traitement pulvérulent, tel qu'une poudre/fluide, de préférence un mélange poudre/gaz, au début de la chambre de traitement, sur toute la largeur des torons étalés, à une vitesse au moins égale à la leur, dans une direction parallèle à leur déplacement ou faisant un angle de 60 ° maximum avec ladite direction parallèle. Un dispositif pouvant être utilisé pour mettre en oeuvre le procédé ci-dessus comprend au moins un élément qui étale les torons et une chambre dans laquelle s'effectue le traitement.
PCT/NL1997/000691 1996-12-16 1997-12-12 Procede et dispositif pour traiter des torons avec un materiau pulverulent WO1998031535A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53470/98A AU5347098A (en) 1996-12-16 1997-12-12 Method and apparatus for treating strands with pulverulent material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1004796A NL1004796C1 (nl) 1996-12-16 1996-12-16 Werkwijze en inrichting voor het behandelen van draden met poedervormig materiaal.
NL1004796 1996-12-16

Publications (1)

Publication Number Publication Date
WO1998031535A1 true WO1998031535A1 (fr) 1998-07-23

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PCT/NL1997/000691 WO1998031535A1 (fr) 1996-12-16 1997-12-12 Procede et dispositif pour traiter des torons avec un materiau pulverulent

Country Status (3)

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AU (1) AU5347098A (fr)
NL (1) NL1004796C1 (fr)
WO (1) WO1998031535A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073132A1 (fr) 1999-05-27 2000-12-07 Single Buoy Moorings Inc. Procede permettant de positionner un bateau et bateau pourvu de moyens de freinage et de blocage de tourelle
WO2010108701A1 (fr) 2009-03-24 2010-09-30 Evonik Degussa Gmbh Préimprégnés et corps moulés réalisés à partir desdits préimprégnés
WO2010108723A1 (fr) 2009-03-24 2010-09-30 Evonik Degussa Gmbh Préimprégnés et corps moulés réalisés à basse température à partir desdits préimprégnés
DE102010029355A1 (de) 2010-05-27 2011-12-01 Evonik Degussa Gmbh Verfahren zur Herstellung von lagerstabilen Polyurethan-Prepregs und daraus hergestellte Formkörper
DE102010041247A1 (de) 2010-09-23 2012-03-29 Evonik Degussa Gmbh Verfahren zur Herstellung von lagerstabilen Polyurethan-Prepregs und daraus hergestellte Formkörper aus Polyurethanzusammensetzung in Lösung
DE102011006163A1 (de) 2011-03-25 2012-09-27 Evonik Degussa Gmbh Lagerstabile Polyurethan-Prepregs und daraus hergestellte Formkörper aus Polyurethanzusammensetzung mit flüssigen Harzkomponenten
DE102016219289A1 (de) * 2016-10-05 2018-04-05 Bayerische Motoren Werke Aktiengesellschaft Rovingimprägnierverfahren für Nasswickeltechnik
EP3330311A1 (fr) 2016-12-02 2018-06-06 Evonik Degussa GmbH Préimprégné de monocomposant polyuréthane stable au stockage et corps moulés ainsi fabriqués à partir de ladite composition de polyuréthane

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1008382C2 (nl) * 1998-02-20 1999-08-24 Flexline Services Limited Werkwijze en inrichting voor het behandelen van uit continue filamenten bestaande samenstellen.

Citations (9)

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Publication number Priority date Publication date Assignee Title
FR2031719A5 (fr) * 1969-02-05 1970-11-20 Verre Textile Ste
US3625667A (en) * 1969-06-18 1971-12-07 Owens Corning Fiberglass Corp Method for coating and forming high strength glass fiber mat
US3877911A (en) * 1972-09-13 1975-04-15 Owens Corning Fiberglass Corp Method and apparatus for producing fibers
WO1987000563A1 (fr) * 1985-07-16 1987-01-29 Flexline Services Ltd. Procede et dispositif permettant d'appliquer des materiaux en poudre sur des filaments
US5057338A (en) * 1990-05-16 1991-10-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Process for application of powder particles to filamentary materials
US5102690A (en) * 1990-02-26 1992-04-07 Board Of Trustees Operating Michigan State University Method coating fibers with particles by fluidization in a gas
US5134959A (en) * 1989-06-19 1992-08-04 General Electric Company Apparatus for coating fibers with thermoplastics
US5213843A (en) * 1991-08-05 1993-05-25 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Vacuum powder injector and method of impregnating fiber with powder
US5310582A (en) * 1993-02-19 1994-05-10 Board Of Trustees Operating Michigan State University Apparatus and high speed method for coating elongated fibers

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2031719A5 (fr) * 1969-02-05 1970-11-20 Verre Textile Ste
US3625667A (en) * 1969-06-18 1971-12-07 Owens Corning Fiberglass Corp Method for coating and forming high strength glass fiber mat
US3877911A (en) * 1972-09-13 1975-04-15 Owens Corning Fiberglass Corp Method and apparatus for producing fibers
WO1987000563A1 (fr) * 1985-07-16 1987-01-29 Flexline Services Ltd. Procede et dispositif permettant d'appliquer des materiaux en poudre sur des filaments
US5134959A (en) * 1989-06-19 1992-08-04 General Electric Company Apparatus for coating fibers with thermoplastics
US5102690A (en) * 1990-02-26 1992-04-07 Board Of Trustees Operating Michigan State University Method coating fibers with particles by fluidization in a gas
US5057338A (en) * 1990-05-16 1991-10-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Process for application of powder particles to filamentary materials
US5213843A (en) * 1991-08-05 1993-05-25 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Vacuum powder injector and method of impregnating fiber with powder
US5310582A (en) * 1993-02-19 1994-05-10 Board Of Trustees Operating Michigan State University Apparatus and high speed method for coating elongated fibers

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073132A1 (fr) 1999-05-27 2000-12-07 Single Buoy Moorings Inc. Procede permettant de positionner un bateau et bateau pourvu de moyens de freinage et de blocage de tourelle
WO2010108701A1 (fr) 2009-03-24 2010-09-30 Evonik Degussa Gmbh Préimprégnés et corps moulés réalisés à partir desdits préimprégnés
WO2010108723A1 (fr) 2009-03-24 2010-09-30 Evonik Degussa Gmbh Préimprégnés et corps moulés réalisés à basse température à partir desdits préimprégnés
DE102009001806A1 (de) 2009-03-24 2010-09-30 Evonik Degussa Gmbh Prepregs und daraus bei niedriger Temperatur hergestellte Formkörper
DE102009001793A1 (de) 2009-03-24 2010-10-07 Evonik Degussa Gmbh Prepregs und daraus hergestellte Formkörper
US8455090B2 (en) 2009-03-24 2013-06-04 Evonik Degussa Gmbh Prepegs and molded bodies produced thereof at low temperature
WO2011147688A1 (fr) 2010-05-27 2011-12-01 Evonik Degussa Gmbh Procédé de préparation de pré-imprégnés de polyuréthane stables au stockage et corps moulés préparés à partir de ceux-ci
DE102010029355A1 (de) 2010-05-27 2011-12-01 Evonik Degussa Gmbh Verfahren zur Herstellung von lagerstabilen Polyurethan-Prepregs und daraus hergestellte Formkörper
DE102010041247A1 (de) 2010-09-23 2012-03-29 Evonik Degussa Gmbh Verfahren zur Herstellung von lagerstabilen Polyurethan-Prepregs und daraus hergestellte Formkörper aus Polyurethanzusammensetzung in Lösung
WO2012038105A1 (fr) 2010-09-23 2012-03-29 Evonik Degussa Gmbh Procédé de fabrication de préimprégnés de polyuréthanne stables au stockage et corps moulés formés de ces préimprégnés à base d'une composition de polyuréthanne en solution
DE102011006163A1 (de) 2011-03-25 2012-09-27 Evonik Degussa Gmbh Lagerstabile Polyurethan-Prepregs und daraus hergestellte Formkörper aus Polyurethanzusammensetzung mit flüssigen Harzkomponenten
WO2012130672A1 (fr) 2011-03-25 2012-10-04 Evonik Degussa Gmbh Pré-imprégnés de polyuréthane stables au stockage et corps moulés préparés à partir desdits pré-imprégnés à base d'une composition de polyuréthane contenant des composants en résine liquides
DE102016219289A1 (de) * 2016-10-05 2018-04-05 Bayerische Motoren Werke Aktiengesellschaft Rovingimprägnierverfahren für Nasswickeltechnik
EP3330311A1 (fr) 2016-12-02 2018-06-06 Evonik Degussa GmbH Préimprégné de monocomposant polyuréthane stable au stockage et corps moulés ainsi fabriqués à partir de ladite composition de polyuréthane
US10626236B2 (en) 2016-12-02 2020-04-21 Evonik Operations Gmbh Storage-stable one-component polyurethane prepregs and shaped bodies composed of polyurethane composition that have been produced therefrom

Also Published As

Publication number Publication date
AU5347098A (en) 1998-08-07
NL1004796C1 (nl) 1997-02-27

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